I've seen references to the lack of a scaling function for this type of operation in prior posts. Since I have a variety of other cad tools availible, I simply use them.
In some posts, they refer to the use of the ability to scale Alibre Symbols upon importation as an alternative. I've just now muddled through a process using that, perhaps someone will weigh in on how to do it more efficiently
-Import DXF
-Define it as a symbol
-Load a copy of the symbol (in the same drawing or a new one)
-Use the scale functions when loading
-select and explode the symbol.....
-Export as DXF or desired format
-whew...